WTF: De-specialize PtrHash<T>.

third_party/WebKit/Source/wtf/RetainPtr.h

 /*
  *  Copyright (C) 2005, 2006, 2007, 2008, 2010 Apple Inc. All rights reserved.
  *
  *  This library is free software; you can redistribute it and/or
  *  modify it under the terms of the GNU Library General Public
  *  License as published by the Free Software Foundation; either
  *  version 2 of the License, or (at your option) any later version.
  *
  *  This library is distributed in the hope that it will be useful,
  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  *  Library General Public License for more details.
  *
  *  You should have received a copy of the GNU Library General Public License
  *  along with this library; see the file COPYING.LIB.  If not, write to
  *  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  *  Boston, MA 02110-1301, USA.
  *
  */
 
 #ifndef RetainPtr_h
 #define RetainPtr_h
 
 #include "wtf/HashTableDeletedValueType.h"
 #include "wtf/HashTraits.h"
 #include "wtf/TypeTraits.h"
 #include <algorithm>
+#include <type_traits>
 #include <utility>
 
 #if USE(CF)
 #include <CoreFoundation/CoreFoundation.h>
 #endif
 
 #ifdef __OBJC__
 #import <Foundation/Foundation.h>
 #endif
 
@@ skipping 252 matching lines @@
     return RetainPtr<T>(AdoptNS, o);
 }
 
 // Helper function for creating a RetainPtr using template argument deduction.
 template <typename T> inline RetainPtr<T> retainPtr(T) WARN_UNUSED_RETURN;
 template <typename T> inline RetainPtr<T> retainPtr(T o)
 {
     return RetainPtr<T>(o);
 }
 
-template <typename P> struct HashTraits<RetainPtr<P>> : SimpleClassHashTraits<RetainPtr<P>> { };
+template <typename T>
+struct HashTraits<RetainPtr<T>> : SimpleClassHashTraits<RetainPtr<T>> { };
 
-template <typename P> struct PtrHash<RetainPtr<P>> : PtrHash<typename RetainPtr<P>::PtrType> {
-    using PtrHash<typename RetainPtr<P>::PtrType>::hash;
-    static unsigned hash(const RetainPtr<P>& key) { return hash(key.get()); }
-    using PtrHash<typename RetainPtr<P>::PtrType>::equal;
-    static bool equal(const RetainPtr<P>& a, const RetainPtr<P>& b) { return a == b; }
-    static bool equal(typename RetainPtr<P>::PtrType a, const RetainPtr<P>& b) { return a == b; }
-    static bool equal(const RetainPtr<P>& a, typename RetainPtr<P>::PtrType b) { return a == b; }
+template <typename T>
+struct RetainPtrHash : PtrHash<typename std::remove_pointer<typename RetainPtr<T>::PtrType>::type> {
+    using Base = PtrHash<typename std::remove_pointer<typename RetainPtr<T>::PtrType>::type>;
+    using Base::hash;
+    static unsigned hash(const RetainPtr<T>& key) { return hash(key.get()); }
+    using Base::equal;
+    static bool equal(const RetainPtr<T>& a, const RetainPtr<T>& b) { return a == b; }
+    static bool equal(typename RetainPtr<T>::PtrType a, const RetainPtr<T>& b) { return a == b; }
+    static bool equal(const RetainPtr<T>& a, typename RetainPtr<T>::PtrType b) { return a == b; }
 };
 
-template <typename P> struct DefaultHash<RetainPtr<P>> { typedef PtrHash<RetainPtr<P>> Hash; };
+template <typename T>
+struct DefaultHash<RetainPtr<T>> {
+    using Hash = RetainPtrHash<T>;
+};
 
 } // namespace WTF
 
 using WTF::AdoptCF;
 using WTF::AdoptNS;
 using WTF::adoptCF;
 using WTF::adoptNS;
 using WTF::RetainPtr;
 using WTF::retainPtr;
 
 #endif // WTF_RetainPtr_h